Four Columns with Tulle and Lights draped to center . . . can a helium balloon hold it up?

I am going to have four columns on the corners of a dance floor; with tulle and light strands draped to the center of the floor. What size and how many balloons would it take to keep the tulle and lights up for my reception?

Please let me know asap - my event is this weekend. Or if you have another suggestion with photo.

Thanks!